Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/23/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 07/25/2025 | 05:55:14 | -70.44, -93.00 | 129.14 | 07/25/2025 | 05:56:25 | -70.32, -92.34 | 129.29 | 27.48 | 71 |
| 2 | 07/25/2025 | 06:45:53 | 70.07, 74.88 | 50.49 | 07/25/2025 | 06:45:55 | 70.05, 74.91 | 50.46 | 2.63 | 2 |
| 3 | 07/25/2025 | 07:36:35 | -69.97,-117.64 | 129.62 | 07/25/2025 | 07:35:25 | -69.94,-117.61 | 129.64 | 3.07 | 70 |
| 4 | 07/27/2025 | 22:12:03 | -70.13, 23.25 | 128.86 | 07/27/2025 | 22:12:57 | -70.14, 23.28 | 128.86 | 1.70 | 54 |
| 5 | 07/27/2025 | 23:02:47 | 70.04,-169.30 | 51.05 | 07/27/2025 | 23:02:24 | 70.03,-169.23 | 51.05 | 2.60 | 23 |
| 6 | 07/27/2025 | 23:53:15 | -69.19, -0.74 | 129.84 | 07/27/2025 | 23:52:07 | -69.21, -2.71 | 129.72 | 78.05 | 68 |
| 7 | 07/30/2025 | 14:28:58 | -70.10, 139.07 | 128.26 | 07/30/2025 | 14:29:27 | -70.11, 139.12 | 128.26 | 2.29 | 29 |
| 8 | 07/30/2025 | 15:19:41 | 69.95, -53.40 | 51.60 | 07/30/2025 | 15:18:55 | 69.94, -53.48 | 51.60 | 3.18 | 46 |
| 9 | 08/02/2025 | 05:55:14 | 70.35, 87.13 | 52.67 | 08/02/2025 | 05:56:25 | 70.27, 87.59 | 52.56 | 19.47 | 71 |
| 10 | 08/02/2025 | 06:45:53 | -70.07,-105.11 | 127.62 | 08/02/2025 | 06:45:57 | -70.06,-105.07 | 127.63 | 1.82 | 4 |
| 11 | 08/02/2025 | 07:36:36 | 69.93, 62.40 | 52.25 | 08/02/2025 | 07:35:24 | 69.94, 62.41 | 52.27 | 1.19 | 72 |
| 12 | 08/04/2025 | 22:12:05 | 70.12,-156.74 | 53.13 | 08/04/2025 | 22:12:56 | 70.14,-156.70 | 53.14 | 2.73 | 51 |
| 13 | 08/04/2025 | 23:02:47 | -69.99, 10.77 | 127.00 | 08/04/2025 | 23:02:27 | -69.99, 10.71 | 127.00 | 2.36 | 20 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/23/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 07/23/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9